We have been running our exchange 2003 servers for 18 months and use both site to site VPN's and manual VPN's via XP Pro. All connect in Watchguard Firewalls. After 18mths one site in Dublin has stopped working. We can VPN in OK, browse the servers, use citrix, remote control servers, ping the servers, tracert the servers but we cannot get our Outlook 2003 to connect and download emails. It keeps saying "trying to connect". All other sites are working fine - any ideas appreciated - thanks Nyall